. {
    margin: 0;
}
body {
    display: flex;
    justify-content: center;
}
body>div {
    width: 1200px;
}
.title {
    color: rgb(230, 145, 55);
    font-size: 30px;
    padding: 10px;
    border-bottom: 1px solid rgb(230, 145, 55);
}

.top {
    background-image: url("../img/banner_qtah.jpg");
    height: 600px;
    /*width: 1200px;*/
    background-size: 100% 100%;
    color: white;
}
/*----------头部公共居中----------------*/
.top>div {
    display: flex;
    justify-content: center;
}
.top>div>div {
    width: 1000px;
}
/*------------居中结束----------------*/

/*.company {
    display: flex;
    justify-content: center;
!*    height: 141px;*!
}*/
/*logo设置高宽*/
.company>div:nth-child(1) {
    /*width: 1000px;*/
    /*border: 1px solid rebeccapurple;*/
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.company>div:nth-child(1)>div:nth-child(1) {
    height: 141px;
    width: 204px;
}
.company>div:nth-child(1)>div:nth-child(1) img {
    height: 100%;
    width: 100%;
}
.company>div:nth-child(1)>div:nth-child(2) {
    display: flex;
    align-items: center;
}
.company>div:nth-child(1)>div:nth-child(2) div {
    margin: 5px;
}
/*----------------导航--------------------*/
.nav {
    background-color: rgb(230,145,55);
    height: 50px;
    /*display: flex;*/
    /*justify-content: center;*/
}
.nav>div {
    /*width: 1000px;*/
    /*border: 1px solid rebeccapurple;*/
    display: flex;
    align-items: center;
}
.nav>div>div {
    /*margin: 20px;*/
    /*height: 50px;*/
    padding: 0 20px;
    line-height: 50px;
}
.nav>div>div:hover {
    background-color: white;
    color: rgb(230,145,55);
}

/*----------------广告信息----------------------------*/
.ad > div {
    /*width: 900px;*/
    /*border: 1px solid red;*/
}

.ad > div > div:nth-child(1) {
    padding: 30px 0 10px;
    font-size: 30px;
}

.ad > div > div:nth-child(2) > div {
    font-size: 10px;
    line-height: 20px;
}

.ad > div > div:nth-child(3) {
    color: rgb(230, 145, 55);
    font-size: 30px;
}

.ad > div > div:nth-child(3) > div:nth-child(1) {
    display: flex;
    align-items: flex-end;
}

.ad > div > div:nth-child(3) > div:nth-child(1) > div:nth-child(2) {
    margin-right: 20px;
}

.ad > div > div:nth-child(3) > div:nth-child(1) > div:nth-child(odd) {
    color: white;
    font-size: 15px;
}

.ad > div > div:nth-child(3) > div:nth-child(2) {
    text-indent: 1.5em;
}